ALEXANDRIA, Va., April 15 -- United States Patent no. 12,601,411, issued on April 14, was assigned to AOTECH Co. LTD. (Hwaseong-si, South Korea).
"Powder protecting three-way valve with cylindrical heating element" was invented by Seung Yong Lee (Hwaseong-si, South Korea).
According to the abstract* released by the U.S. Patent & Trademark Office: "A powder protecting three-way valve installed in a line of a semiconductor or flat panel display manufacturing apparatus to control flow of reaction by-product gas, includes: a valve casing comprising an inlet pipe through which the reaction by-product gas flows in and a plurality of outlet pipes through which the inflowing reaction by-product gas flows out in different directions; a rotating ba...